schwarzenegger admits she raised suspicions before, but he hadn't been truthful. so you lied to her. >> you can say that. >> reporter: baena remained the couple's housekeeper, working for the woman she had betrayed. >> even after you realized it, was that -- was that strange? >> very difficult, strange, whatever you want to call it, but that's the best way i could handle it. >> reporter: schwarzenegger also writes of a, quote, hot fair with actress bridget nielsen, his co-star in the film "red son sonya." he was already living with shriver at the time. >> she knew? >> yeah. >> so it is a recurring issue? with you? >> i'm not perfect. >> reporter: affairs weren't the only secrets. schwarzenegger also admits he tried to hide open heart surgery from shriver, and says he didn't tell her about his run for governor until days before he announced it. >> she started shaking, and she had tears in her eyes. i realized i was stepping into something that was much deeper than just mere running and her being a supportive wife. >> reporter: she ultimately gave up her journalism